DE3112242A1 - MIRROR LENS TELEPHOTO LENS - Google Patents

Description

PATENT Attorney Dipl-Phyt. RICHARD LUYKEN

OOt 7781 03/27/1981 L / Ro

description Mirror lens telephoto lens

The invention relates to a mirror lens telephoto lens, in particular, a telephoto lens of the so-called catadioptric type, which is for use with one-eyed SLR cameras are provided.

Compared with normal photographic telephoto lenses, a mirror lens telephoto lens can do extraordinary things can be made compact and light in weight and at the same time it also has the great advantage that the the disturbing secondary spectrum caused chromatic aberration is very low. Hence there are already different types by mirror lens telephoto lenses.

A known example of such a mirror lens telephoto objective ¹ is known from Japanese laid-open publication 19 09/72. From the angle of the field of view of the exemplary embodiment, this lens appears to be a telephoto lens for a focal length of fa 500 mm. Compared to other photographic telephoto lenses with f = 500 mm, this lens is considerably more compact and shows the good properties of mirror lens telephoto lenses.

From Japanese Patent Application Laid-Open No. 131835/78 is a

another example of a mirror lens photo lens known, which is even more compact) has a very low telephoto ratio of 0.29.

With mirror lens telephoto lenses, shifting the front lens is usually provided for simple focusing. With this type of focusing, the value of the spherical aberration changes considerably as the shooting distance changes. Therefore, even if the aberrations are infinitely corrected for distance photography, considerable aberrations, particularly spherical aberration and coma, occur in close-up photography. In the case of the aforementioned telephoto lens disclosed in Japanese Patent Laid-Open No. 131835/78, the aberrations are not really well corrected from this point of view, and therefore this lens is not fully satisfactory in practical use. In the case of the mirror lens telephoto objective according to this Japanese laid-open specification, which is shown schematically in FIG. 1, attempts have been made to reduce disturbing radiation, the ghost images, by arranging a lens L_ with a very large thickness between the lens L. arranged on the object side and the primary mirror L_ caused to suppress, in which case black paint can also be applied to the circumferential surface A of the thick lens L. However, since a lens L _c with a very large thickness is used, the ob-

jective not + - be trained satisfactorily easily, «From jer

Above this, the radiation which enters through the lens L. but is not _{suppressed by the circumferential surface A of the thick lens L 5} , the thick lens L ₅ through its object-side surface R (for example the beam 1 in FIG. 1) is through the surface R broken and directed in the direction indicated ^{by I 1.} When the upper

flat R at a position closer to the image side, for example in the position R ', the beam 1 is ^{refracted by the surface R 1} and directed in the ^{direction indicated by I 11} , since the surface R is a dispersing surface. This means that the radiation I ^{11 travels} to a point outside the image surface. In other words, if the surface R is closer to the image side (if the lens L _{5 is} thinner), the radiation 1 travels to a position outside the image area and does not cause ghosting. From this point of view, too, it appears advantageous to make _{the lens L 5 thinner.}

It is an object of the present invention to provide a mirror lens telephoto lens that is extremely light in weight and very compact in construction and with good aberrations regardless of the shooting distance are corrected.

According to the invention, this is achieved by what is stated in the claims marked features.

The invention will now be explained in more detail with reference to the drawings.

In the drawings shows:

Fig. 1. A schematic sectional view through a known Mirror lens telephoto lens,

Fig. 2 is a schematic sectional view through an inventive Mirror lens telephoto lens,

Fig. 3-6 Correction curves "of lenses according to the invention 1-4, and

112242

Fig. 7-10 Correction curves for spherical aberration, when lenses 1-4 are set for close-up photography.

The mirror lens telephoto object according to the invention has the structure shown schematically in FIG. 2 and contains a first, second, third, fourth and fifth lens in the direction of propagation of the radiation, the first lens L _{1 being} a positive meniscus lens convex on the object side, the second lens L _? a negative meniscus lens convex on the image side with a reflection surface on its convex side leaving a transparent central section free, the third lens L_ a biconvex lens with a smaller diameter than the lens L _{1 is} cemented, the fourth lens L _{4 is} a biconcave lens with a diameter of is smaller than that of the first lens and which is cemented onto the object-side surface of the first lens L ₁ and has a reflection surface on the object-side surface, the fifth lens is a negative meniscus lens which is cemented _{onto the object-side surface of the second lens L 2 and} has a diameter which is smaller than that of the second lens L ₂ , v, although the concave surface is on the object side. With this objective, the radiation from the object enters the objective through the first lens L ₁ , is reflected by the image-side surface of the second lens L ₂ , passes through the third lens L ₃ , the first lens L-, and then again through the object-side surface the fourth lens L ₄ to be reflected back and after passing through the first lens L ₁ and the third lens L ₃ to pass through the fifth lens L ₅ and then exit through the second lens Lp and deliver the image.

is that on the image-side surface of the first lens

During the development of the lenses according to the invention Compliance with the following conditions has proven to be essential.

(1) 0.45f <T ₁ <0.75f

(2) 0.29f <f ₁₂ <0.33f

(3) 0.03f <dg + d ₃ <0.03f

(4) n ₃ > 1.73

(5) n ₄ <1.58 where denotes

r- the radius of curvature of the object-side surface the first lens L-,

d _{3 is} the thickness of the second lens L ₂ , dg is the thickness of the fifth lens L ₅ ,

n. , n _{3 are} the refractive indices of third lens L ₃ and fourth lens L ₄ ,

^f the focal length of the lens. and

₁₂ the focal length of the first lens L- and second lens L_ »ie the focal length of a system in which the object-side surface of the lens L. as the entrance surface and the object-side surface of the second lens L- as exits for the client, the system then being designed in this way is that the radiation from the object into the system through the object-side

3 ι 12242

Surface of the lens L ₁ enters, the lens L ₁ passes through, enters the second lens L ₂ through its object-side surface, is reflected on the image-side surface of the second lens L and then through the object-side surface of the second lens L _? exits the system.

The meaning of the above conditions is as follows:

Conditions (1) and (2) are used to correct spherical aberration that is otherwise worsened in a lens with front lens shift when setting for close-up photography. In order to correct spherical aberration, it is necessary to restrict the refractive power distribution and the curvature of the lens surfaces in the front lens group of the objective to a certain extent. This restriction is given by the conditions ^) and (2). Of these, condition (1) limits the radius of curvature on the object-side surface of the first lens L ₁ . If r. is smaller than the lower limit of condition (1), spherical aberration and coma that occur when the lens is set to infinity can be corrected relatively well and it is also possible to use the Petzval sum for recordings with the Correct distance infinitely well. However, when the lens is adjusted for close-up photography, spherical aberration and coma increase considerably. When T _{1 is} larger than the upper limit of condition (1), the increase in spherical aberration and coma that occur when the lens is adjusted for close-up photography becomes relatively small. However, it becomes impossible to properly correct the aberrations that occur when the lens is set to the distance infinity and

O ί ί

IS

in particular, the Petzval sum is given a large positive value. Attempting to correct the Petzval sum will result in coma and it is also undesirable.

/
Condition (2) limits the refractive power of the convergent formed by the first lens L ₁ and the second lens L _p

Systems. When is smaller than the lower limit of condition (2), it becomes easier to make the lens compact. However, the refractive power of the through the fourth lens L., the fifth lens L _{1 increases} . and the second lens L_ formed diffusing system. As a result, the spherical aberration caused by the converging system when the lens is adjusted for close-up photography is considerably increased by the diffusing system and this is undesirable for correcting the aberrations for close-up photography. If ^ _{12 is} larger than the upper limit of condition (2), it becomes difficult to make the lens compact.

In the case of the objective according to the invention, the fifth lens L ₁ - is made thin in order to make the objective light and to eliminate the aforementioned interference radiation. Condition (3) is used to achieve this goal. If d _o + d _o is greater than the upper limit of condition (3), the thicknesses of the fifth lens L ₅ and the second lens L "become large. As a result, there is a risk of ghosting and the lens becoming heavy. If d _Q + d_ is smaller than the lower limit of condition (3), there is a risk of pincushion distortion.

In order to correct the aberrations that occur when setting for close-ups, it is necessary to correct the Petzval sum well , which is otherwise a large positive

Assumes value. As one of the correction methods for achieving this goal, it is essential that the refractive index of the glass used for the third lens L ~ is selected to be high
and the refractive index of the glass used for the fourth lens L. is selected to be low. This is guaranteed by conditions (4) and (5). If either of these conditions is not met, the Petzval Sum becomes unfavorable and this is bad for correcting aberrations in close-ups that are closely related to the Petzval Sum
are connected.

A mirror-line telephoto lens which satisfies these conditions achieves the object on which the invention is based. However, the following conditions are also advantageously met , for the reasons explained in more detail below:

(6) 0.13 <d _o <0.15f

(7) n ₂ <1.6

(8) n ₅ < ¹ ^

(9) ^ - <50

(10) 0.3f <f ₃ <0.4f

(H) o, i8f <:} f ~ _A J <: o, 25f

(12) 0.18f <f _{? 6} <0.24f
where denote:

d "the distance between the first lens L- and the second
Lens L ₂ (d ₂ = d _& + d ₇ + dg),

n. + n _{5 are} the refractive indices of the second lens L " or
fifth lens L ₅ ,

IO

» _{E is} the Abbe number of the fifth lens L ₁ -,

f "the focal length of the third lens

the focal length of the subsystem into which the radiation through the image-side surface of the third lens L_

occurs, after passing through the third lens L and the first lens L ₁ enters the fourth lens L ₄ , reflected by the object-side surface of the fourth lens L., the first lens L ₁ and the third lens L ₃ passes through again and the subsystem through the image-side surface of the third lens L ₃ leaves and

fp_ the focal length of the subsystem made up of the second lens Lp and the fifth lens L ₅

The meaning of these conditions (6) to (12) is as follows:

Condition (6) limits the distance d_ between first lens L. and second lens L. If d _{2 is} smaller than the lower limit of the condition (6), it becomes difficult to properly correct spherical aberration and coma that occur in shooting at infinity and close-up shooting. If d_ is greater than the upper limit value, the overall length of the objective becomes large and this contradicts the object on which the invention is based. In addition, the intensity of the marginal radiation becomes low.

The conditions (7) and (8) each limit the refractive indices of the second lens L "and fifth lens L ₁ -

glass materials used. If either n _? or n, - is greater than the upper limit value of the relevant condition, there is a risk that the Petzval sum assumes a large positive value and that, in addition, pincushion distortion occurs.

The condition (9) (limits the Abbe number of the glass used for the fifth lens L ^ , and compliance with this condition is essential for the correction of off-axis chromatic aberration. If ^ _{5 is} larger than the upper limit of the condition (9), becomes off-axis chromatic aberration undercorrected.

Conditions (10) to (12) further limit the power distribution for the lenses.

Condition (10) relates to the focal length of the third lens L_. If f_ is smaller than the lower limit of condition (10), there is a risk that the Petzval sum will take a large positive value. If f _{3 is} larger than the upper limit value of condition (10), there is a risk of distortion occurring.

Condition (11) relates to the diffusing system which includes the secondary mirror and the lenses cemented therewith, ie the fourth lens L ₄ , the first lens L ₁ and

the third lens V ^{If f} A is ^{smaller than the lower limit} value of the condition (11), it becomes impossible to correct spherical aberration and coma well for close-up photography. If f. is larger than the upper limit value of the condition (11), it becomes difficult to keep the length of the lens short.

Condition (12) relates to the divergent system with a fifth lens L _c and a second lens L _n . If f _{oc is} smaller

b Z Zo

than the lower limit of the condition (12), the pincushion distortion considerable. If on the other hand

ι W

f is greater than the upper limit of condition (12), there is a risk that the Petzval sum will have a large positive Assumes value and, as mentioned earlier, this is undesirable.

The invention will now be explained in more detail on the basis of objectives according to the invention.

C ²

Lens 1 has those in Table 1, lens »that in Table 2, the lens! the data listed in Table 3 and the lens 4 in Table 4. -

Table 1 Σ Ρ - 0.360

T ₁ »49.733 T ₂ - 123.532 r ₃ - -35.230 r ₄ - -52.023 Γ ₃ - -35.230 T ₅ - -32.731 V _n - 123.532

T ₆ - -28.196

Γ, - 123,532 r _c «-32.731

7 ^β ■■ '■ r ₃ - -35,230 r ₄ - -52.023

Ci ₁ - 2.062 d ₂ - 13.694 d ₃ - 1.861 ύ . -1.861 d ₄ - -12.658

-0.622

2.062

d ₇ - 9.964 d ₈ . 2.694-1.58913

- 1.56732
- 1.56732

1.-54771
1.54771
1.58913

- 1.56444 # 1.56732

- ytr-

T?

- 61.11

- 42.83

- 42.83

- 40.20

- 61.11

- 62.83

- 62.83

- 61.11

- 40.20

- 43.78

- 42.83

f - 100.0

2 U) - 5.15

f, - 139.9, f, o - 30.0, f.

12th ^Γ Ν0 34.1,

^f 25 - -22.4.

0.8715, 7.0 T - 0.29

f _A - -20.1 f ₄ - -32.8 f _u - 70.05

J ί

Table 2

£ P- 0.400

^Γ 1 * 66.382 ^Γ 2 - 292.413 ^Γ 3 - -33.647 ^Γ 4 - -52.051 ^Γ 3 - -33.647 ^Γ 5 - -33.372 ^Γ 2 - 292.413 ^Γ 1 «68,382 ^Γ 6 = ~? 8.161 ^Γ 1 - 68.382 ^Γ 2 «292,413 ^Γ 5 - -33.372 ^Γ 7 «-9,854 ^Γ 3 »-33.647 ^Γ 4 - -52.051 f - 100.0 ^f l - 151.0, ^f 4 - -42.9,

^d l - 2.062 ⁿ i - 1.58913 ^r i - 61.11 ^d 2 - 14.165 ^d 3 - 1.861 n ₂ - 1.56732 2 - 42.83 ^d 3 - -1.861 n ₂ » 1.56732 ^ ₂ - 42.83 ^d 4 - -13.128 ^d 5 - -1.036 ⁿ 3 " 1.83400 ^ 3 - 37.19 ^d l - -2,062 ⁿ i ■ 1.58913 - 61.11 ^d 6 - -0.6? 2 ⁿ 4 " 1.46450 K - 64.94 ^d 6 - 0.6? 2 ⁿ 4 - 1.46450 ^ 4 - 65.94 ^d l - 2.062 ⁿ i - 1.58913 - 61.11 ^d 5 - 1.036 ⁿ 3 * 1.83400 > 3 - 37.19 ^d 7 “10.434 ^d 8 - 2.694 ⁿ 5 * 1,64769 V
5 - 33.80

d ₃ - 1.861 n _g - 1.56732 V ₃ . 42.83

2u> - 5.15 °, F _N0 «7.0, T - 0.297,

f ₁₂ - 31.5, f ₃ - 36.0, f _A - -24.9,

f _OB - -19.9, S - 0.9258, f _M - 69.90

ο! I L · ζ

Table 3 - 0.190 ^d l - 2.062 ⁿ i - 1.58913 > \ - ei, 11 SP - 49.830 χ
^d 2 - 13,555 ^r l 135.120 C.
^d 3 - 1.861 ⁿ 2 - 1.56732 ^V ₂ - 42, 83 ^Γ 2- - -35.495 O
^d 3 - -1.861 n ₂ - 1.56732 V> ₂ - 42, 83 ^Γ 3 - -52.286 ο
^d 4 - -12,520 ^Γ 4 - -35.495 * t
^d 5 - -1.036 ⁿ 3 - 1.80610 ^V 3 - ⁴⁰ ' 95 ^Γ 3 - -39.896 D.
^d i - -2,062 V • 1.58913 ^ ₁ - 61, , 11 ^Γ 5 - 135.120 X
^d 6 • -0.622 ⁿ 4 - 1.49831 \\ - 65, , 03 ^Γ 2 - 49.830 ^d ß - -0.622 ⁿ 4 - 1.48931 V ₄ - 65 , 03 ^Γ 1 - -28,370 O
^d l • 2.062 ⁿ i - 1.58913 V ^ - 61 .11 ^Γ 6 - 49.830 X
d, - - 1.036 ⁿ 3 - 1.80610 V> 3 - 40 , 95 ^Γ 1 - 135.120 d ₇ - 9.825 ^Γ 2 - -39.896 ^d a - 2.694 ⁿ 5 - 1.53172 V> ₅ - 48 , 90 ^Γ 5 - -9,490 O
d. - 1.861 ⁿ 2 - 1.56732 ^ ₂ - 42 , 83 ^Γ 7 - -35.495 ^Γ 3 - -52.286

f. 100.0, 2α, - 5.15 °, F _N0 - 7.0, T - 0.289, f _x - 132.8, f ₁₂ - 29.9, f ₃ - 38.3, f _A - "19, 7th

t _A - -36.2 f ₂₅ - -22.5, S - 0.8539, f "- 70.24

J ί

Table 4

. 0.400

-A-

T ₁ - 60.090 Γ ₂ - 221.654 r ₃ - -34.214 r ₄ . -52.256 r ₃ - -34.214 IV - -33.981 V ₂ «221.654 T ₁ - 60.090

Γ. - -27,957 ο

V ₁ «60.090 V ₂ - 221.654 Γ ₅ - -33.981 r ₇ - -9.294

r "" -34.214 ο

r ₄ - -52.256

2.062

13.816

1,861

'3 ^J 4

¹ I.

¹ I ¹ S ^a 7 ^S 8 ^d 3

-1.036

-2,062

-0.622

0.622

2.062

1.036

10.086

2,694

1,861 n - 1.58913

n "- 1.56732

-1.861 n ₂ - 1.56732

-12.780 n ₃ - 1.80440
η _χ - 1.58913

n. "

n "* 1.46450
1.46450
1.58913
1.80440

1.58144
1.56732

- 61.11

- 42.83

- 42.83

- 39.62 \ - 61.11

- 65.94

- 65.94

- 61.11

- 39.62

"^ ₅ - 40.75 VL - 42.83

f - 100.0,

- 5.15,

7.0 0.293,

139.3, f ₁₂ - 31.0. f ₃ - 36.7,

f _A - -23.3,

f ₄ --41.0.

- -20.3, S - 0.8978,

«Λ 1 -f

O ι Ι

- vtr-

denote therein:

r-, Γρ ... the radii of curvature of the lens surfaces in the Consequence of advancement of radiation,

d. , dp ... the distances between the lens surfaces in the order of advancement of the radiation,

κ, n _2> .. the refractive indices of the lenses,

i »\ ··· ^the Abbe numbers of the lenses,

Σ Ρ the Petzval sum,

T is the telephoto ratio,

S is the maximum displacement of the front lens and

f _{M is} the focal length of the lens when the front lens is fully advanced.

The correction curves of the objectives according to the invention can be seen from FIGS. 3 to 10. In Figs. 7, 8, 9 and 10 is the state of correction for close-ups, under adjustment the front lens. 7 shows the spherical aberration of the objective 1 after the front lens has been displaced by 0.8715, whereby the focal length of the lens is then 70.05. Fig. 8 shows the spherical aberration of the Objective 2 after displacement of the front lens by 0.9258, the focal length of the objective being 6900, FIG. 9 the spherical aberration of the objective 3 after shifting the front lens by 0.8539, the focal length of the objective is then 70.4 and FIG. 10 shows the spherical aberration of the objective 4 after the front lens has been shifted by 0.8978, where the focal length of the lens is then 69.87. In

J ι I

7, 8, 9 and 10, however, the aberrations are shown normalized to f = 100.

The spherical aberration of the lens according to the invention for close-ups is reduced by half in comparison on the mirror lens telephoto lens according to Japanese Patent Application Laid-Open No. 131835/78. Compared with the mirror lens telephoto lens according to the Japanese published publication 1909/72, the aberrations are approximately the same as corrected in this known lens, the inventive However, the lens is considerably more compact than the known lens. It follows that with the invention Lenses, the object underlying the invention "a mirror lens telephoto lens that is compact and whose aberrations are corrected well, indicate "is fully resolved.

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Claims (5)

PATENT ADVOCATE Dipl-Phys. RICHARD LUYKEN Olympus Optical Co. Ltd. oot 7781 of Hatagaya 2-43-2, Shibuya-ku 03/27/1981 Tokyo-to, Japan / CLAIMS 1. / Mirror lens telephoto lens that is in the order of the progression of the radiation has first, second, third, fourth and fifth lenses, the first Lens a positive meniscus lens convex on the object side, the second lens a negative meniscus lens convex on the image side with reflective surface on the convex surface, leaving a transparent central section free, the third lens is a biconvex lens cemented onto the image-side surface of the first lens, the fourth lens one on the subject surface of the first lens cemented biconcave lens with a reflection surface on the object-side surface and the fifth lens one on the object-side surface of the second Lens cemented negative meniscus lens is characterized by meeting the following conditions: (1 ) O , 45f ^ ^r i <O , 75f (2 ) O , 29f <f ₁₂ ^hd 3 , 33f (3 ) O , 03f <d ₈ H <0.05f ) η 3> ¹ , 73 (5 ) η , 58 in which denote r. the radius of curvature of the relevant upper O i area of the first lens L.,
d _{3 is} the thickness of the second lens L ₂ , dg is the thickness of the fifth lens L ₅ , n., n _{3 are} the refractive indices of third lens L ₃ and fourth lens L, f the focal length of the lens and f ρ is the focal length of the first lens L ₁ and second lens Lp, ie the focal length of a system in which the object-side surface of the lens L ₁ serves as the entrance surface and the object-side surface of the second lens L "serves as the exit surface, the system then being designed in this way is that the radiation from the object enters the system through the object-side surface of the lens L., passes through the lens L-, enters the second lens L-through its object-side surface, is _{reflected on the image-side surface of the second lens L 2} and then exits the system through the surface of the second lens L “on the object side. 2 · mirror lens telephoto objective according to claim 1 g e k e η η is characterized by the additional fulfillment of the following conditions: (6) 0.13 ν d ₂ <0.15f (7) n ₂ < 1.6 (8) n ₅ <1.67 (9) T? ₅ <50 (10) 0.3f <f3 < 0.4f (11) 0.18f <| f _A J <0.25f 1 122A2 (12) 0.18f <f ₂₅ <0.24f where denote: dp is the distance between first lens L- and second lens L ₂ (Cl ₃ + d _? + d _Q ) , n ₁ + n- the refractive indices of the second lens L _? or fifth lens L ₅ *? .. the Abbe number of the fifth lens L _c , ο b ^f _ the focal length of the third lens L ₃ , f _A The focal length of the subsystem into which the radiation passes through the image-side surface of the third lens L ₀ enters, after passing through the third lens L ~ and the first lens L. in the fourth lens L enters reflected by the object side surface of the fourth lens L., the first lens L and the third lens L "passes through again and the subsystem by leaves the image-side surface of the third lens L and fp, - the focal length of the subsystem consisting of the second lens Lp and fifth lens L ₁ - 3. Mirror lens objective according to claim 2, characterized by the following data, + 5%: W I t Table 1
£ p - 0.360 P _{1-49733 m 2t062 n} ^ ₁₅₈₉₁₃ ^. _eifll p _o - 123.532 2 d ₂ - 13.694 P ₃ . -35,230 ^ _{m iq6i} ^ _{u 156732} ^ ₂ . _42t83 P ₄ - -52.023 _β ^ ^ _{861 n2 m U56732} ^. _{42 (83} p "* -35.230 3 d ₄ «-12.658 P ₅ . -32,731 _d ^ _β _ _{ΐί036 n3 β 176200} T ^. 4 _of 20 P ₂ . 123.532 ^ _β ^ _{2f062 n} ^ _ _lf58913 V ^ ₁ . _61fll P ₁ - 49.733 _d ^ _m _ _{Ot622 n} ^ _{m 1 | 54771} v? ₄ « ₆₂ , 83 P ₆ - -28,196 _dß . _Of622 n ₄ - 1.54771 1 ^ -62.83 ^Γ 1 - ⁴⁹ ' ⁷³³ dj - 2,062 n, - 1.58913 ^ -61.11 r ₂ - 123,532 _{d lt0} 36 H ₃ -1.76200 V ₃ '40 .20 p _c "-32.731 5 d _7-9 ^ 964 P ₇ - -9.849 _d ^ _{β 2> 6g4 n5} _ ₁₅₆₄₄₄ V ₅ . 43.78 P ₃ - -35.230 _ ^ ₈₆₁ ^ _{9 lf56732} y _{2 a 42f83} r. "-52,023 f - 100.0 2Ui - 5.15 ° F _N0 - 7.0 T- 0.29 T ₁ «139.9. f ₁₂ - 30.0. f ₃ - 34.1, ^ - 20.1 ^ - 32.8 _f . > 22.4, S "0.8715, f" - 70.05 mm Bf M denote therein: _ ... the radii of curvature of the lens surface in the Consequence of advancement of radiation, d. , dp ... the distances between the lens surfaces in the order of the advancement of the radiation, n. , np ... the refractive indices of the lenses, 1 '2 *** ^{the AbDe} ~ ^{Zanlen of the} lenses, P the Petzval sum,
T is the telephoto ratio,
S is the maximum displacement of the front lens and fj. the focal length of the lens if the front lens is fully advanced. 4. mirror lens telephoto lens according to claim 2, g e indicates by the following data + 5%: Table 2 -yf '_ £ P = 0.400 T ₁ «68.382 J) ¹ d. - 2.062 n, «1.58913 r . 61.11 v _o - 292,413 ixi ^ά dj, - 14.165 r_ «-33.647 * ■> ^J d, - 1.861 ru - 1.56732 ^r _p - 42.63 r. «-52.051 ^{J d} , ^ d, - -1.861 η - 1.56732 V ₃ - 42.83 r ^ * -33.647 ^J ^ ^d d. - -13.128 r - -33.372 * - _; ° dp- - -1.036 n ^ " 1.83400 r" - 37.19 r = 292.413 ^{ö J} -f ^c d- - -2.062 n, - 1.58913 ν - 61.11 T ₁ - 68,382 ^{X l} J ¹ d- - -0.622 n. - 1.46450 K - 64.94 r _fi »-28.161 ^b / d _A - 0.6P2 n. »1.46450 Y. - 65.94 T ₁ - 68.382 ° ^{β 1} d- - 2.002 n. - 1.58913 Y. - 61.11 r "- 29 ?. 413 Γ ^ dc - 1.036 n "- 1.83400 V - - 37.19 r, - - -33.372 a J J ^D d _7-10.434 r ₇ - -9.854 ₇ ' dp - 2.694 η ,. - 1.64,769 ^y , - 33.80 r ^ «-33,647 UDO ^J d, «1.861 n ₅ - 1.56732 T_ - 42.83 r ₄ «-52.051 d d d f - 100.0 2u> - 5.15 °. F _N0 «7.0, T - 0.297, f _x = 151.0, f ₁₂ - 31.5, f ₃ * 36.0, f _A - -24.9, f ₄ - -42.9, f ₂₅ - -19.9, S - 0.9258, f _M «69.90 112242 denote therein: Γ _χ , r ₂ ... the radii of curvature of the lens surface as a result of the advancement of the radiation, U ₁ , dg ... the distances between the lens surfaces in
the sequence of advancement of the radiation, n _lf n ₂ ... the refractive indices of the lenses, "^, 2 '*' ^d * ^e Abbe numbers of the lenses, P is the Petzval sum, T is the telephoto ratio, S is the maximum displacement of the front lens and ^f M is ^the focal length of the lens when the front lens is fully advanced. 5. mirror lens telephoto lens according to claim 2, g e marked through the following data + 596: Table le 3 «I ■ 2.062 η _χ - 1.58913 Y ₁ - 61, 11 SP - 0.190 ^d 2 " 13,555 ^Γ 1 " 49.830 C.
^d 3 " 1,861 n _2-1.56732 ^ ₂ - 42, 83 r ₂ . 1 .35,120 ^d 3- -1.861 n _2-1.56732 V ^ ₂ - 42, 83 ^r 3 * -35.495 ^d 4 " -12,520 ^Γ 4 " -52.286 d *. - -1.036 n. - 1.80610 V ^ ₃ . 40 95 ^r 3 * -35.495 S.
^d i ■ -2,062 U ₁ - 1.58913 V ^ ₁ - 61, , 11 ^r 5 * -39.896 1
d_ -0.622 n. - 1.49831 V ^ ₄ - 65, , 03 ^r 2 " 135.120 6th
d ,. ■ -0.622 n. - 1.48931 V \ - 65 , 03 ^r i - 49,830 6th
d, - 2.062 n, - 1.58913 ^ .61 , 11 ^Γ 6 " -28,370 1
d ,. ■ 1.036 1
n_ - 1.80610 ^ ₃ - ⁴⁰ , 95 ^Γ 1 " 49.830 5
^d 7 " 9.825 ^Γ 2 " 135.120 W.
d _e - 2,694 n ₅ - 1.53172 V ^ ₅ - 48 , 90 ^Γ 5 - -39.896 O
d _q - 1,861 n _2-1.56732 V ₂ - 42 , 83 ^Γ 7 - -9,490 ^Γ 3 " ■ -35.495 Γ . « . -52.286 f. 100.0. 2ω - 5.15 °, F _N0 - 7.0, T - 0.289, f _x - 132.8. f ₁₂ - 29.9. f ₃ - 38.3. f _A - "19.7 f - -36.2 f ₂₅ - -22.5. S - 0.8539. f "- 70.24 denote therein: T ₁ , r ₂ ... the radii of curvature of the lens surface as a result of the advancement of the radiation, dj, dg ... the distances between the lens surfaces in the sequence of advancement of the radiation, η. , np ... the refractive indices of the lenses, 1 * 2 ''' ^the Abbe numbers of the lenses, P is the Petzval sum, T is the telephoto ratio, S is the maximum displacement of the front lens and fy. the focal length of the lens when the front lens is fully advanced. * Mirror lens telephoto lens according to claim 2, characterized by the following data + 5%: / to Table 4 2P- 0.400 T ₁ - 60.090 ^ _{m 2) 062} ^ _{m lf58913} ^ _{β eitll} V ₂ - 221,654 _{d2 β i3f8i6} r ₃ - -34.214 ^ _{m i86i} ^ _{m lf56732} V ₂ - 42.83 T ₄ "-52,256 _y d, - -1.861 η «- 1.56732 V - 42.83 r ₃ - -34.214 3 d * d. - -12,780
Γ «-33,981 ⁴ d _e - -1.036 n _Q - 1.80440 K, - 39.62 T ₉ - 221.654 5 3d d, - -2.062 n, - 1.58913 Γ. - 61.11 r. - 60.090 1 ^x } U _e - -0.62? n. - 1.46450 V. - 65.94 Γ ■ -27.957 " ⁶ 'd _c - 0.622 n. - 1.46450 V \ - 65.94 T ₁ - 60.090 ₆ 4 * » d- - 2.062 n- - 1.58913 V ⁷ , - 61.11 r _? - 221,654, d _c - 1.036 _no - 1.80440 V, - 39.62 r ₅ - -33.981 5 3 y d- - 10.086 r. -9,294 ⁷ . d _o - 2.694 n _R - 1.58144 \ - 40.75 r - -34,214 8 5 5 d _o - 1.861 n _o - 1.56732 Ύ «42.83 r. «-52,256 3 2 * ί f - 100.0, 2W - 5.15 °, F _N0 - 7.0 T- 0.293, T ₁ - 139.3, f ₁₂ - 31.0, f ₃ - 36.7, f _A - -23.3, f ₄ - -41.0, f ₂₅ - -20.3, S »0.8978, f« - 69.87 ι · .- Δ. ^! -i Δ. denote therein: r ₁ , r _? ... the radii of curvature of the lens surface as a result of the advancement of the radiation, dj, d _r> ... the distances between the lens surfaces in the order of the advancement of the radiation, n., n ~ ... the refractive indices of the lenses, f., r «... the Abbe numbers of the lenses, P is the Petzval sum, T is the telephoto ratio, S is the maximum displacement of the front lens and fj. the focal length of the lens if the front lens is fully advanced.